Catamaran boat hull



FIG. 1 is a front perspective view of the catamaran boat hull showing our new design;

FIG. 2 is a bottom front perspective view thereof;

FIG. 3 is a side elevational view thereof;

FIG. 4 is a bottom plan view thereof; and,

FIG. 5 is an enlarged front elevational view thereof. 

The ornamental design for a catamaran boat hull, as shown. 